Seems like there are more & more people getting Gmail and more & more Gmail tools popping up on the web. Some of them are pretty handy, so here's a quick list of some that I might try:
GTray – an icon for notification of new Gmail in your system tray
G-Mailto – a simple tool to convert "mailto:" links to work with Gmail.
MBox Converter – Import Mbox and MailDir files into Gmail
Pop Goes Gmail – Use a POP tool (outlook, thunderbird) to access Gmail
GetMail for Hotmail – Forward your Hotmail account to Gmail